Article History
Received: 4 April 2022
Accepted: 14 September 2022
First Online: 17 September 2022
Declarations
:
: This retrospective study was approved by the institutional review board of Hunan Children’s Hospital, and the requirement for informed consent was waived. The data used in this study were anonymized before its use.
: Not applicable.
: The authors declare that they have no competing interests.